The SIS3809 is a four channel interrupter on base of the SIS360x/38xx base board. The firmware design is made to allow the user to generate VME interrupts via standard front panel particle physics signal levels. Hence the board provides a way to overcome the lack of front panel interrupt signals on most commercial CPUs, which limits their event building capabilites in some setups. To provide means to control the overall experiment deadtime one FLIPFLOP output per channel is implemented. The FLIPFLOP is set with a pulse on the corresponding interrupt input and can be cleared under program control (in the interrupt service routine e.g.). The polarity of the FLIPFLOP signals can be inverted with a bit of the control register (i.e. level clear upon IRQ, level set under program control).
Have a look at the Photograph of the LEMO version (which looks actually just the same as the SIS3807 pulse generator) or at the Photograph of the flat cable version.
4 channels
programmable common interrupt level for all inputs
one FLIPFLOP output/channel (to be inverted under program control)
NIM/TTL/ECL versions
flat cable (TTL/ECL) and LEMO (TTL/NIM) versions
A16/A24/A32 D16/D32Base address settable via 5 rotary switches (A32-A12) and one jumper (A11)
VIPA geographical addressing prepared
VIPA LED set
FLIPFLOP LEDs
Up to eight firmware files
single supply (+5 V)
Generation of VME interrupts to trigger event readout
Deadtime FLIPFLOP
Small channel count I/O register
The module is perfectly suited to overcome the front panel I/O shortfall of most COTS SBCs and PCI to VME interfaces (in the case of the SIS1100/3100 PCI to VME interface the functions of the SIS3809 can be covered by the front panel I/O option in a more efficient way).